Title of Invention

A PROCESS FOR PREPARING A LUBRICATING BASE OIL

Abstract The present invention relates to a process to prepare a lubricating base oil having a saturates content of more than 90% weight, a sulphur content of less than 0.03 % weight and a viscosity index of between 80-120 starting from.a lubricating base oil product having a saturates content of below 90% weight and a sulphur content of between 300 ppmw and 2% weight, which base oil product is obtained by first removing part of the aromatic compounds from a petroleum fraction boiling in the lubricating oil range by means of solvent extraction resulting in a solvent extracted product and subsequel1tly solvent dewaxing the solvent extracted product to obtain the lubricating base oil product, wherein the following steps are performed, a) contacting the lubricating base oil product with a suitable sulphided hydrotreating catalyst in the presence of hydrogen in a first hydrotreating step at a temperature of between 250 and 350°C and at a pressure of between 20 and 100 bar; b) separating the effluent of step a) into a gaseous fraction and a liquid fraction, wherein the liquid fraction has a sulphur content of between 50 and 1000 ppmw and a nitrogen content of less than 50 ppmw; c) , contacting the liquid fraction of step (b) with a catalyst comprising platinum and palladium and an amorphous silica/alumina support, wherein the total amount of platinum and palladium is between 0.2 and 5% weight in the presence of hydrogen in a second hydrotreating step wherein the pressure in step (c) is between 20 and 100 bar; and (d) recovering the lubricating base oil having the specified properties.
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Documents:

in-pct-2001-1655-che abstract.pdf

in-pct-2001-1655-che claims.pdf

in-pct-2001-1655-che correspondence others.pdf

in-pct-2001-1655-che correspondence po.pdf

in-pct-2001-1655-che description complete.pdf

in-pct-2001-1655-che form-19.pdf

in-pct-2001-1655-che form-3.pdf

in-pct-2001-1655-che form-5.pdf

in-pct-2001-1655-che pct.pdf

in-pct-2001-1655-che petition.pdf

in-pct-2001-1655-che power of attoney.pdf


Patent Number 233740
Indian Patent Application Number IN/PCT/2001/1655/CHE
PG Journal Number 20/2009
Publication Date 15-May-2009
Grant Date 02-Apr-2009
Date of Filing 27-Nov-2001
Name of Patentee SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV
Applicant Address CAREL VAN BYLANDTLAAN 30, NL-2596 HR THE HAGUE,
Inventors:
# Inventor's Name Inventor's Address
1 DUPREY, Eric Route de Caen, F-76530 Grand Couronne,
2 FATTAZ, Jean-Paul 48, RUE V. SCHOELCHER, 76650 PETIT-COURONNE,
3 GARIN, Roland, Albert, Charles Route de Caen F-76530 Grand Couronne,
4 MOUREAUX, Patrick Route de Caen, F-76530 Grand Couronne,
PCT International Classification Number C10G 67/04
PCT International Application Number PCT/EP2000/004983
PCT International Filing date 2000-05-26
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 99401286.2 1999-05-28 EUROPEAN UNION